[Lowfer] xsv in EN90xn

[Michael Sapp]

Garry: Living near several 5 to 50 AM BC stations I have gotten used to the 
RF jungle warfare environment. That experience does help one to seek out 
ways to build a high dynamic range receiver and converter, but even so there 
are practical limits to what one can achieve.  I would think most ham 
receivers are not usually tested for, much less built for, blocking dynamic 
range with frequency spacing of 50Hz or less.  I did notice that XJM was not 
on the air last night, so my reciever and converter were not being  high 
level challenged to the usual degree. I was surprised though as I was using 
my older Acer with the 16bit internal sound card last night on 630M wspr2 
and put the Xonar U7 and new Acer on 137kHz QRSS60... The new Acer and 24bit 
Xonar U7 externla sound card would have dug into the noise another 2~3 db on 
wspr2 and would have better handled strong signals with the extra 8 bits of 
sampling performance....

No whining noises intended here, we have to deal with the signal environment 
handed to us and make the best of it....

My package from Khune arrived....


http://shop.kuhne-electronic.de/kuhne/en/shop/amateur-radio/accessoires/crystal-heater/Precision+crystal+heater+40%C2%B0+QH40A/?card=724

Perhaps in a few weeks to a month I may be able to get the proportional oven 
xtal kits installed on my two FT-847s, which seem to have better front-end 
overload handling capability than my FT-817s...no K3 low phase noise options 
in the pipeline here with the 1st harmonic in college....

73, Mike wa3tts


----- Original Message ----- 
From: "Garry" <k3siw at sbcglobal.net>
To: "lowfer list" <lowfer at mailman.qth.net>
Sent: Monday, November 02, 2015 8:51 AM
Subject: Re: [Lowfer] xsv in EN90xn


> FB Mike! I also got an XSV decode, but only once, and a few from VE7
> BDQ, though less than usual. The reason for that is despite BDQ having 
> used 475740 Hz for quite some time, WH2XRR came up on exactly that 
> frequency a couple days ago and at least last night was running a 50% duty 
> cycle to boot. Can't understand when 
> "http://www.wsprnet.org/olddb?mode=html&band=2190&limit=50&findcall=wg2xsv&findreporter=&sort=date" 
> and "http://www.wsprnet.org/drupal/wsprnet/spots" provide such nice 
> listings of the decodes why the ops don't spread out and not step on each 
> other. There's plenty of room in the 200 Hz WSPR bandwidth since only a 
> dozen or so stations are currently active.
> -- 
> Garry, K3SIW, EN52ta, Elgin, IL
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